[Windows] /browse server becomes orphan process after session ends — chrome-headless-shell.exe console windows keep popping up #807

Environment

• OS: Windows 11 Pro
• Shell: bash (via Claude Code)
• gstack version: local install

Problem

When a Claude Code session that used /browse ends, the gstack/browse/dist/server-node.mjs node process is not cleaned up. It stays alive as an orphan process and continues spawning new chrome-headless-shell.exe child processes.

On Windows, each new chrome-headless-shell.exe spawn causes a console window to briefly flash/appear on screen, which is very disruptive during normal use.

Steps to Reproduce

1. Use /browse skill in a Claude Code session
2. Close or end the Claude Code session
3. Observe: node.exe running server-node.mjs remains in Task Manager
4. Observe: chrome-headless-shell.exe windows keep popping up repeatedly

Process Tree (after session ended)

node.exe (server-node.mjs)  ← orphan, parent PID no longer exists
  └── chrome-headless-shell.exe
        ├── chrome-headless-shell.exe (gpu-process)
        ├── chrome-headless-shell.exe (utility/network)
        └── chrome-headless-shell.exe (renderer)

Expected Behavior

The browse server process should terminate when the parent Claude Code session ends (e.g., via a cleanup hook or by detecting parent process exit).

Suggested Fix

• Add a parent-process watchdog in server-node.mjs: poll for parent PID and self-exit if parent is gone
• Or register a SessionEnd hook in Claude Code to explicitly kill the browse server PID
• On Windows, ensure chrome-headless-shell.exe is spawned with CREATE_NO_WINDOW to suppress console flicker even as a temporary measure

Workaround

Manually kill the orphan node process and its children:

taskkill /F /PID <server-node PID> /T